Cementitious Composition With High Bond Strength To Both Asphalt And Cement Based Materials

ABSTRACT

A cementitious composition of one embodiment, according to the present teaching, includes, but is not limited to, a Portland cement, and at least one other cement from a group comprising, but not limited to, calcium sulfoaluminate cement, a calcium aluminosilicate cement, and calcium aluminate, wherein the Portland cement has a content of at least 20 percent based on the total weight of the non-Portland hydratable cement powder, wherein the cementitious composition bonds to asphalt.

TECHNICAL FIELD

The present teaching relates generally to a cementitious composition,and more precisely to provide a permanent repair product which bonds toboth asphalt and cement based roadway and walkway surfaces.

BACKGROUND

It is generally believed that fly ash, calcium aluminate, calciumsulfoaluminate, and Portland based hydraulic cements do not bondadequately to asphalt to be used as repair products. Most repairproducts are designed to be applied to either asphalt or cementitioussubstrates, but are not capable of bonding adequately to both.

Portland cement is hydraulic cement produced by pulverizing clinkerswhich consist essentially of hydraulic calcium silicates, usuallycontaining one or more of the forms of calcium sulfate as an interground addition. It consists of at least two-thirds by mass of calciumsilicates (3 CaO. SiO2 and 2 CaO.SiO2), the remainder consisting ofaluminum- and iron containing clinker phases and other compounds. Theratio of CaO to SiO2 shall not be less than 2.0. The magnesium oxidecontent shall not exceed 5.0% by mass.

Non-Portland cement is a high resistance, sustainable cement with theaddition of raw materials such as: calcium sulfoaluminate, alkalialuminosilicates, calcium aluminate and certain hydrocarbons.

Previous cementitious compositions comprise either multiple types ofcement or only a single type of cement. These mixtures are formulated toachieve a balance of properties (such as set time, compressive strength,shrinkage, and chemical resistance) suited to a particular application.However, each previous composition, whether made of a multiple or singletypes of cement, come with their own set of challenges.

Two component polymer based materials require on-site mixing of theresin and hardener in precise ratios in order to achieve the targetedperformance. Epoxy, polyurea, and polyester resins are the most commonin use and are typically supplied in pre-measured packaging to reducethe potential of the end user mixing the proportions incorrectly. Thedirections often state that to ensure proper performance, mix the entirecontents of the packaging. This often results in wasted excess materialand associated higher costs. Another negative aspect is that frequentlythe aggregate is packaged separately and must be mixed in a secondarystep, which adds to the labor time on-site. Still another negativeaspect is that the polymers used are not water based and thus the tooland on-site clean up requires flammable solvents or aggressivedetergents whose run-off may contaminate adjacent soil and waterways.

Single component polymer compositions are moisture cured and designed tosimplify the process for the end user by simply adding water once thematerial is placed. They have the disadvantage of short shelf life dueto moisture contamination during manufacturing and packaging,particularly when produced on high humidity days. Once the packaging isopened, any unused material will be exposed to atmospheric moisture,resulting in the curing and hardening in the packaging, even afterresealing. The end result is that the product is susceptible tohardening in the packaging either from the factory over time or onceopened, rendering it useless, instilling cost losses, and yielding wastematerial.

Prior to the present teaching, Portland Cement, calcium sulfoaluminate,calcium aluminate, calcium aluminosilicate, and fly ash cements do notbond to asphalt. Prior to the present teaching, the high strengthcement, mortar, and concrete disclosed in U.S. Pat. No. 8,016,937 bySchumacher, Patel, Sampson, and Riley, explicitly has less than 20%Portland content in the hydratable cement portion of the compositions.None of the composition examples described therein contain Portlandcement or calcium sulfoaluminate cement. Further, this composition doesnot provide adequate bonding to asphalt.

Prior to the present teaching, it is known to use fly ash in Portlandcement compositions as a filler material. Brook, et. al. in U.S. Pat.No. 5,556,458 discloses that at least 20% Portland cement is needed toovercome the low early strength of their alkali earth metal saltactivated fly ash cement compositions with calcium aluminate used forcompensating autogenous shrinkage. Just like the other prior art, thiscomposition does not provide adequate bonding to asphalt.

Prior to the present teaching, it is generally believed that fly ash,calcium aluminate, calcium sulfoaluminate, and Portland based hydrauliccements do not bond adequately to asphalt to be used as repair products.

Therefore, it would be beneficial to have a cementitious compositionutilizing the synergistic effects of combining a particular blend ofmultiple types of cement, which provides a permanent repair product forboth asphalt and cement based roadways and walkways without the negativeattributes of previous cementitious compositions made up of cementblends.

SUMMARY

The needs set forth herein as well as further and other needs andadvantages are addressed by the present embodiments, which is illustratesolutions and advantages described below.

The blended hydraulic cement composition of the present teaching may beformulated in the following manner. Each of the individual componentsmay be added individually to the packaging and dry mixed in thepackaging or on site prior to the addition of water. Each of theindividual components may be pre-blended prior to packaging and thewater added on site. The hydraulic cement may also have the aggregatesincorporated into the packaging. Packaging may include plastic buckets,polyethylene lined Kraft paper bags, plastic bags, supersacks, and bulktotes, although not limited thereto.

The cementitious composition of the present teaching may be combinedwith fine and/or course aggregates as defined and recommended by theAmerican Concrete Institute to produce a mortar, grout, or shotcrete.

The cementitious composition of the present teaching will permit theuser to avoid being exposed to hazardous organic vapors, chemical burns,and thermal burns.

The cementitious composition of the present teaching will permit theuser to avoid use of flammable solvents or corrosive detergents to cleantools and supplies, thus eliminating potential environmental damagecaused by spills and washout runoff.

The cementitious composition of the present teaching forms a hardenedcement when a sufficient amount of water is added to achieve the desiredconsistency and can be mixed until homogenous using either hand tools,drill mixer, rotary drum mixer, mortar mixer, grout pump, auger,sprayer, or shotcrete mixer, although not limited thereto.

The cementitious composition of the present teaching may be placed ontoa cement, concrete, macadam, brick, compacted aggregate, compacted soil,asphalt substrate(s), although not limited thereto, prior to hardening,consolidating the composition, surface finishing the composition, andallowing the composition to cure.

The cured composition of the present teaching can be used to form a roadsurface, walkway, vertical barrier, wall, flooring, decking, castarticles, or repairs thereof, although not limited thereto.

The composition of the present teaching forms a bond to the substratethat is stronger than the substrate.

The cementitious composition of one embodiment, according to the presentteach, includes a Portland cement, and at least one other cement from agroup comprising calcium sulfoaluminate cement, a calciumaluminosilicate cement, and calcium aluminate cement, where the Portlandcement has a content of at least 10 percent based on the total weight ofthe non-Portland hydratable cement powder, and where the cementitiouscomposition bonds to asphalt.

In a further embodiment, the composition is free of latex bondingagents.

In a further embodiment, the at least one other cement is between 0.5 to70 percent of the composition.

In a further embodiment, an additive selected from a group comprisingretarders, shrinkage reducing agents, air entraining agents, aggregates,fillers, extenders, pigments, water reducers, fiber reinforcements,rheology modifiers, and set accelerators.

The cementitious composition of another embodiment, according to thepresent teaching, includes a Portland cement, at least one other cementfrom a group comprising a calcium aluminate cement, a calciumsulfoaluminate cement, a calcium aluminosilicate cement, a non-Portlandhydratable cement powder, which includes a pozzolanic powder and has acalcium content expressed as oxides of at least 15 weight percent basedon the total weight of the non-Portland hydratable cement powder, and analkali salt, where the Portland cement has a content of at least 20percent based on the total weight of the non-Portland hydratable cementpowder.

In a further embodiment, the composition is free of latex bondingagents.

In a further embodiment, the at least one other cement content isbetween 0.5 and 70 percent of the composition.

In a further embodiment, the alkali salt content is between 0.1 and 10percent of the composition.

In a further embodiment, an alkali ion of the alkali salt is selectedfrom a group comprising lithium, sodium, potassium, magnesium, andcalcium.

In a further embodiment, the alkali ion is in stoichiometric proportionwith a hydrocarboxylic acid to form a pH neutral salt.

In a further embodiment, the hydrocarboxylic acid is selected from agroup comprising citric, lactic, and propionic.

In a further embodiment, the pozzolanic powder is selected from a groupcomprising Class C Fly Ash, Class F Fly Ash, volcanic ash, diatomaceousearth, rice hull ash, opal, and a high free lime content powder.

In a further embodiment, the high free lime content powder is selectedfrom a group comprising lime kiln dust, cement kiln dust, slag,granulated blast furnace slag cement, calcium oxide.

In a further embodiment, an additive selected from a group comprisingretarders, shrinkage reducing agents, air entraining agents, aggregates,fillers, extruders, pigments, water reducers, fiber reinforcements,rheology modifiers, and set accelerators.

The cementitious composition of another embodiment, according to thepresent teaching, includes a non-Portland hydratable cement powder,which includes a pozzolonic powder and has a calcium content expressedas oxides of at least 15 weight percent based on the total weightpercent of the non-Portland hydratable cement powder, an alkali salt, atleast one other cement from a group comprising a calcium aluminate, acalcium sulfoaluminate cement, or a calcium aluminosilicate cement,where the non-Portland hydratable cement powder has a content of atleast 10% on the total weight of the cementitious content, and where thecementitious composition bonds to asphalt.

In a further embodiment, the composition is free of bonding agents andPortland cement.

In a further embodiment, the at least two cement contents are between0.5 and 90 percent of the composition.

In a further embodiment, the alkali salt content is between 0.1 and 10percent of the composition.

In a further embodiment, an alkali ion of the alkali salt is selectedfrom a group comprising lithium, sodium, potassium, magnesium, andcalcium.

In a further embodiment, the alkali ion is in stoichiometric proportionwith a hydrocarboxylic acid to form a pH neutral salt.

In a further embodiment, the hydrocarboxylic acid is selection from agroup comprising citric, lactic, and propionic.

In a further embodiment, the pozzolonic powder is selected from a groupcomprising Class C Fly Ash, Class F Fly Ash, volcanic ash, diatomaceousearth, rice hull ash, opal, and high free lime content powder.

In a further embodiment, the high free lime content powder is selectedfrom a group comprising lime kiln dust, cement kiln dust, slag,granulated blast furnace slag, calcium oxide.

In a further embodiment, an additive selected from a group comprisingretarders, shrinkage reducing agents, air entraining agents, aggregates,fillers, pigments, water reducers, fiber reinforcements, rheologymodifiers, and set accelerators.

The cementitious composition of another embodiment, according to thepresent teaching, includes at least two cements from a group comprisinga calcium aluminate cement, a calcium sulfoaluminate cement, and acalcium aluminosilicate cement, where at least two cements comprise atleast 10 percent of the composition, where the cementitious compositionbonds to asphalt.

In a further embodiment, the cementitious composition is free of latexbonding agents, Portland cement, and a non-Portland hydratable cementpowder selected from a group comprising fly ash, rice hull ash, opal,diatomaceous earth volcanic ash, ground blast furnace slag cement, andhigh free lime content powder.

In a further embodiment, an additive selected from a group comprisingretarders, shrinkage reducing agents, air entraining agents, aggregates,fillers, pigments, water reducers, fiber reinforcements, rheologymodifiers, and set accelerators.

Other embodiments of the composition are described in detail below andare also part of the present teachings.

For a better understanding of the present embodiments, together withother and further aspects thereof, reference is made to the detaileddescription.

BRIEF DESCRIPTION OF THE DRAWINGS

FIG. 1 shows a poor bond between a Portland concrete and an asphaltpavement.

FIG. 2 shows a separation of a concrete slab from a Portland concretesubstrate.

FIG. 3 shows a bond between the present teaching and asphalt pavement.

FIG. 4 shows an enlarged image of FIG. 3.

FIG. 5 shows a bond between the present teaching and a Portland cementmortar.

FIG. 6 shows a bond between asphalt and Fly Ash with calciumsulfoaluminate.

FIG. 7 shows a bond between asphalt and Activated Fly Ash with calciumaluminate.

FIG. 8 shows a bond between asphalt and Activated Fly Ash with calciumsulfoaluminate.

FIG. 9 shows a bond between asphalt and Portland cement with calciumaluminate.

FIG. 10 shows a bond between asphalt and Portland cement with calciumaluminate and with calcium aluminosilicate.

FIG. 11 shows a bond between asphalt and Portland cement with ActivatedFly Ash and with calcium aluminate.

FIG. 12 shows a bond between asphalt and Portland cement with Fly Ashand with calcium sulfoaluminate.

FIG. 13 shows a bond between asphalt and Portland cement with ActivatedFly Ash.

DETAILED DESCRIPTION

This application discloses several numerical ranges in the text. Thenumerical ranges disclosed inherently support any range or value withinthe disclosed numerical ranges even though a precise range limitation isnot stated verbatim in the specification because this present teachingcan be practiced throughout the disclosed numerical ranges.

For the purpose of this teaching, the phrase “substantially free” shallmean present in an amount of less than 1 weight percent based on thetotal weight of the referenced composition.

For the purpose of this teaching, the term “Activated Fly Ash” isdefined as Fly Ash in the presence of a carboxylic acid salt.

In compliance with the statute, the present teachings have beendescribed in language more or less specific as to structural andmethodical features. It is to be understood, however, that the presentteachings are not limited to the specific features shown and described,since the systems and methods herein disclosed comprise preferred formsof putting the present teachings into effect.

Generally, all terms used in the claims are to be interpreted accordingto their ordinary meaning in the technical field, unless explicitlydefined otherwise herein. All references to a/an/the element,composition, apparatus, component, means, step, etc., are to beinterpreted openly as referring to at least one instance of the element,composition, apparatus, component, means, step, etc., unless explicitlystated otherwise. The steps of any method disclosed herein do not haveto be performed in the exact order disclosed, unless explicitly stated.The use of “first,” “second,” etc. for different features/components ofthe present disclosure are only intended to distinguish thefeatures/components from other similar features/components and not toimpart any order or hierarchy to the features/components.

To aid the Patent Office and any readers of any patent issued on thisapplication in interpreting the claims appended hereto, Applicant doesnot intend any of the appended claims or claim elements to invoke 35U.S.C. 112(f) unless the words “means for” or “step for” are explicitlyused in the particular claim.

The cementitious composition of one embodiment, according to the presentteaching, includes, but is not limited to, a Portland cement, and atleast one other cement from a group comprising, but not limited to,calcium sulfoaluminate cement, a calcium aluminosilicate cement, andcalcium aluminate, wherein the Portland cement has a content of at least20 percent based on the total weight of the non-Portland hydratablecement powder, wherein the cementitious composition bonds to asphalt.

The cementitious composition of one embodiment, according to the presentteaching, includes, but is not limited to, a Portland cement, a calciumaluminate cement or a calcium aluminosilicate cement, a non-Portlandhydratable cement powder, which includes a pozzolanic powder and has acalcium content expressed as oxides of at least 15 weight percent basedon the total weight of the non-Portland hydratable cement powder, analkali salt, and the Portland cement has a content of at least 20percent based on the total weight of the non-Portland hydratable cementpowder.

The cementitious composition of one embodiment, according to the presentteaching, includes, but is not limited to, a non-Portland hydratablecement powder, which includes a pozzolanic powder and has a calciumcontent expressed as oxides of at least 15 weight percent based on thetotal weight percent of the non-Portland hydratable cement powder, analkali salt, at least two cements from a group comprising, but notlimited to, a calcium aluminate cement, a calcium sulfoaluminate cement,and a calcium aluminosilicate cement, wherein the non-Portlandhydratable cement powder has a content of at least 10% on the totalweight of the cementitious content, wherein the cementitious compositionbonds to asphalt.

The cementitious composition of one embodiment, according to the presentteaching, includes, but is not limited to, at least two cements from agroup comprising, but not limited to, a calcium aluminate cement, acalcium sulfoaluminate cement, and a calcium aluminosilicate cement,wherein at least two cements comprise at least 10 percent of thecomposition, wherein the cementitious composition bonds to asphalt.

According to one embodiment the cementitious composition issubstantially free of latex bonding agents.

According to one embodiment the cementitious composition issubstantially free of bonding agents and Portland cement.

According to one embodiment the cementitious composition issubstantially free of latex bonding agents, Portland cement, and anon-Portland hydratable cement powder selected from a group comprising,but not limited to, fly ash, rich hull ash, opal, diatomaceous earthvolcanic ash, ground blast furnace slag cement, and high free limecontent powder.

According to one embodiment the calcium sulfoaluminate cement, orcalcium aluminosilicate, or calcium aluminate content is between 0.5 and70 percent of the cementitious composition.

According to one embodiment the calcium aluminate, calciumsulfoaluminate, or calcium aluminosilicate content is between 0.5 and 90percent of the composition.

According to one embodiment the pozzolanic powder is selected from agroup consisting of Class C Fly Ash which was produced from thecombustion of sub-bituminous or lignite coal, Class C Fly Ash which wasproduced by co-combustion of coal with clay and slag, Class F Fly Ashwhich was produced via co-combustion of coal with clay and slag,volcanic ash, diatomaceous earth, rice hull ash, opal, combinationsthereof, or a blend of a high free lime content powder, and wherein thepozzolanic powder contains less than 15 percent calcium oxide and theoverall calcium content of the calcium oxides is greater than 15percent.

According to one embodiment the high free lime content powder isselected from a group consisting of lime kiln dust, cement kiln dust,slag, granulated blast furnace slag cement, calcium oxide, orcombinations thereof.

According to one embodiment the alkali salt comprises either an alkalimetal ion or an alkaline earth metal ion and comprises between 0.1 and10 percent of said cementitious composition.

According to one embodiment the alkali metal ion is selected from agroup consisting of lithium, sodium, or potassium and said alkalineearth metal ion is selected from a group consisting of magnesium orcalcium, or in combinations thereof, in stoichiometric proportion with ahydrocarboxilic acid to form a pH neutral salt.

According to one embodiment the hydrocarboxilic acid is selected from agroup consisting of citric, lactic, propionic based, or combinationsthereof.

According to one embodiment the cementitious composition furthercomprises an additive selected from a group consisting of retarders,shrinkage reducing agents (SRA), air entraining agents (AEA),aggregates, fillers or extenders, pigments, water reducers, fiberreinforcements, rheology modifiers, set accelerators, or combinationsthereof.

According to one embodiment the retarder is selected from a groupconsisting of boric acid, sodium tetraborate, potassium tetraborate,boric oxide, sodium borate, potassium borate, borax pentahydrate, boraxdecahydrate, sulfate salts, sugars, sugar acids, lignins, orcombinations thereof in total consisting of between 0.1 and 2.5 percentof said cementitious composition.

According to one embodiment the shrinkage reducing agents functions byexpanding to offset the autogenous shrinkage of the Portland andpozzolanic materials, including certain compounds which can formettringite in-situ, and/or metal oxides whose hydrates have a lowerspecific gravity than their oxides.

According to one embodiment the ettringite formation during hydration isthe product of various combinations of calcium sulfate cement (CS),calcium aluminate cement (CA), calcium aluminosilicate (CAS), calciumsulfoaluminate cement (CSA), calcium sulfate hemihydrate, calciumsulfate, and/or aluminum sulfate.

According to one embodiment the shrinkage reducing agent functions as aninhibitor to moisture egress during hydration and is selected from agroup consisting of silica fume, liquid glycol, neopentyl glycol, aliquid glycol adsorbed on a surface of a solid carrier, calciumstearate, magnesium stearate, or a combination thereof.

According to one embodiment the shrinkage reducing agent furthercomprises a fine particulate metal powder selected from a group ofalkali metals, alkali earth metals, aluminum, titanium, zinc, iron,magnesium, manganese, nickel, zirconium, vanadium, or combinationsthereof which will react with water to generate hydrogen or oxygen gas.

According to one embodiment the aggregate is selected from a groupconsisting of pea gravel, river rock, sand, crushed rock, orcombinations thereof.

According to one embodiment the filler or extender is selected from agroup consisting of ground glass, cenospheres, aluminum oxide, groundnutshells, ground rubber, fine ground hardened Portland cement, fineground Portland concrete, find ground ceramic, fine ground clay brick,calcium carbonate, nephylene syenite, aluminum trihydrate, pumice,wollastonite, Class F fly ash, kaolin, meta-kaolin, silicon dioxide,dolomite, perlite, slate, other fine ground types of stone, orcombinations thereof.

According to one embodiment the pigment is selected from a groupconsisting of metal oxides including iron oxides, titanium dioxide, orcombinations thereof.

According to one embodiment the water reducer is selected from a groupconsisting of lignin, melamine, naphthalene, polycarboxylate, acryliclatex, or combinations thereof.

According to one embodiment the fiber reinforcement is selected from agroup of fibers consisting of nylon, polypropylene, Kevlar, steel,polyester, polyamide, acrylamide, basalt, e-glass, s-glass, orcombinations thereof, in various lengths between 0.125 and 2 inches inlength.

According to one embodiment the rheology modifier is selected from agroup consisting of lignin, melamine, naphthalene, polycarboxylate,acrylic latex, silica fume, fumed silica, precipitated silica,polyethylene oxide, or combinations thereof.

According to one embodiment the set accelerator is selected from a groupconsisting of lithium carbonate, lithium hydroxide monohydrate, lithiumnitrate, lithium fluoride, lithium chloride, lithium borate, lithiumacetate, lithium citrate, lithium lactate, lithium gluconate, orcombinations thereof.

According to one embodiment the Portland cement, non-Portland cement,calcium aluminate cements, calcium aluminosilicate cements, and calciumsulfoaluminate cement elements of the cementitious composition are freeof the following materials: citric acid; lactic acid; alkali metal;metal carbonate; amine based activators; caustic compounds, such assodium hydroxide, lithium hydroxide, and potassium hydroxide;geopolymers; non-aqueous thermoset organic polymers, such aspolyurethane, epoxy, polyurea, and polyacrylates; bitumen; asphalt;asphalt polymer blends; chloride, iodide, bromide, and fluoride ions andsalts; and combinations thereof.

According to one embodiment the cementitious composition can be used torepair roadways, sidewalks, foot paths, driveways, foundations, masonrywork, joints for drains and pipes, water tightness of a structure,floors, roofs, beans, stairs, pillar, fencing posts, bridge, culverts,dams, tunnels, wells, water tanks, lighthouses, tennis courts, lampposts, although not limited thereto.

According to one embodiment the cementitious composition bonds toasphalt.

Referring now to FIG. 1, the figure shows the lack of a good bondbetween a Portland concrete over asphalt pavement. FIG. 1 shows thecurrent problem in cementitious compositions.

Referring now to FIG. 2, the figure shows the bond separation at thebottom of a concrete slab from a Portland concrete substrate.

Referring now to FIG. 3, the figure shows the cementitious compositionaccording to the present teaching bonding to asphalt pavement in theupper left corner after outdoor exposure. The surface area was struckwith repeated hammer blows in an unsuccessful attempt to delaminate thetwo dissimilar materials. There is a diagonal crack in the presentteaching layer originating in the left center edge of the photograph.The crack was created by the sharp impact which caused the ejection ofsome aggregate in the asphalt layer. The interface bond remained intactdemonstrating that the bond is stronger than either of the twodissimilar materials as evidence by failure within each material but notat the bond.

Referring now to FIG. 4, the figure shows an enlargement of theinterface fracture surface section from FIG. 3. The figure shows thefull contact between the two dissimilar materials even after theadjacent areas receiving fracture inducing forces.

Referring now to FIG. 5, the figure shows the cementitious compositionaccording to the present teaching bonded to a Portland cement mortarafter outdoor exposure. The area was struck with repeated hammer blowsin an unsuccessful attempt to delaminate the two dissimilar materials.The present teaching is depicted in the upper portion of the photographand the Portland mortar is in the lower portion of the photograph.

Referring now to FIG. 6, the figure shows the cementitious compositioncomprising Fly Ash and calcium sulfoaluminate bonding to asphalt.

Referring now to FIG. 7, the figure shows the cementitious compositioncomprising Activated Fly Ash and calcium aluminate bonding to asphalt.

Referring now to FIG. 8, the figure shows the cementitious compositioncomprising Activated Fly Ash and calcium sulfoaluminate bonding toasphalt.

Referring now to FIG. 9, the figure shows the cementitious compositioncomprising Portland cement and calcium aluminate bonding to asphalt.

Referring now to FIG. 10, the figure shows the cementitious compositioncomprising Portland cement, calcium aluminate, and calciumaluminosilicate bonding to asphalt.

Referring now to FIG. 11, the figure shows the cementitious compositioncomprising Portland cement, Activated Fly Ash, and calcium aluminatebonding to asphalt.

FIGS. 3, 4, and 5 show that the bond between the present teaching andsubstrates remained intact through several thermal and freeze and thawcycles.

The above description is presented to enable a person skilled in the artto make and use the present teaching, and is provided in the context ofa particular application and its requirements. Various modifications tothe preferred embodiments will be readily apparent to those skilled inthe art, and the generic principles defined herein may be applied toother embodiments and applications without departing from the spirit andscope of the present teaching. Thus, this present teaching is notintended to be limited to the embodiments shown, but is to be accordedthe widest scope consistent with the principles and features disclosedherein.

What is claimed is:
 1. A cementitious composition comprising: a Portlandcement; and at least one other cement from a group comprising calciumsulfoaluminate cement, a calcium aluminosilicate cement, and calciumaluminate cement; wherein the Portland cement has a content of at least10 percent based on the total weight of the non-Portland hydratablecement powder; wherein the cementitious composition is used for bonds toasphalt.
 2. The cementitious composition of claim 1, wherein thecomposition is free of latex bonding agents.
 3. The cementitiouscomposition of claim 1, wherein the at least one other cement is between0.5 to 70 percent of the composition.
 4. The cementitious composition ofclaim 1, further comprising an additive selected from a group comprisingretarders, shrinkage reducing agents, air entraining agents, aggregates,fillers, extenders, pigments, water reducers, fiber reinforcements,rheology modifiers, and set accelerators.
 5. A cementitious compositioncomprising: a Portland cement; at least one other cement from a groupcomprising calcium sulfoaluminate cement, a calcium aluminosilicatecement, and calcium aluminate; a non-Portland hydratable cement powder,which includes a pozzolanic powder and has a calcium content expressedas oxides of at least 15 weight percent based on the total weight of thenon-Portland hydratable cement powder; and an alkali salt; wherein thePortland cement has a content of at least 20 percent based on the totalweight of the non-Portland hydratable cement powder.
 6. The cementitiouscomposition of claim 5, wherein the composition is free of latex bondingagents.
 7. The cementitious composition of claim 5, wherein the at leastone other cement content is between 0.5 and 70 percent of thecomposition.
 8. The cementitious composition of claim 5, wherein thealkali salt content is between 0.1 and 10 percent of the composition. 9.The cementitious composition of claim 8, wherein an alkali ion of thealkali salt is selected from a group comprising lithium, sodium,potassium, magnesium, and calcium.
 10. The cementitious composition ofclaim 9, wherein the alkali ion is in stoichiometric proportion with ahydrocarboxylic acid to form a pH neutral salt.
 11. The cementitiouscomposition of claim 10, wherein the hydrocarboxylic acid is selectedfrom a group comprising citric, lactic, and propionic.
 12. Thecementitious composition of claim 5, wherein the pozzolanic powder isselected from a group comprising Class C Fly Ash, Class F Fly Ash,volcanic ash, diatomaceous earth, rice hull ash, opal, and a high freelime content powder.
 13. The cementitious composition of claim 12,wherein the high free lime content powder is selected from a groupcomprising lime kiln dust, cement kiln dust, slag, granulated blastfurnace slag cement, calcium oxide.
 14. The cementitious composition ofclaim 5, further comprising an additive selected from a group comprisingretarders, shrinkage reducing agents, air entraining agents, aggregates,fillers, extruders, pigments, water reducers, fiber reinforcements,rheology modifiers, and set accelerators.
 15. A cementitious compositioncomprising: a non-Portland hydratable cement powder, which includes apozzolonic powder and has a calcium content expressed as oxides of atleast 15 weight percent based on the total weight percent of thenon-Portland hydratable cement powder; an alkali salt; and at least twocements from a group comprising a calcium aluminate cement, a calciumsulfoaluminate cement, and a calcium aluminosilicate cement; wherein thenon-Portland hydratable cement powder has a content of at least 10% onthe total weight of the cementitious content wherein the cementitiouscomposition bonds to asphalt.
 16. The cementitious composition of claim15, wherein the composition is free of bonding agents and Portlandcement.
 17. The cementitious composition of claim 15, wherein the atleast two cements content is between 0.5 and 90 percent of thecomposition.
 18. The cementitious composition of claim 15, wherein thealkali salt content is between 0.1 and 10 percent of the composition.19. The cementitious composition of claim 15, wherein an alkali ion ofthe alkali salt is selected from a group comprising lithium, sodium,potassium, magnesium, and calcium.
 20. The cementitious composition ofclaim 19, wherein the alkali ion is in stoichiometric proportion with ahydrocarboxylic acid to form a pH neutral salt.
 21. The cementitiouscomposition of claim 20, wherein the hydrocarboxylic acid is selectedfrom a group comprising citric, lactic, and propionic.
 22. Thecementitious composition of claim 15, wherein the pozzolonic powder isselected from a group comprising Class C Fly Ash, Class F Fly Ash,volcanic ash, diatomaceous earth, rice hull ash, opal, and high freelime content powder.
 23. The cementitious composition of claim 22,wherein the high free lime content powder is selected from a groupcomprising lime kiln dust, cement kiln dust, slag, granulated blastfurnace slag, calcium oxide.
 24. The cementitious composition of claim15, further comprising an additive selected from a group comprisingretarders, shrinkage reducing agents, air entraining agents, aggregates,fillers, pigments, water reducers, fiber reinforcements, rheologymodifiers, and set accelerators.
 25. A cementitious compositioncomprising: at least two cements from a group comprising a calciumaluminate cement, a calcium sulfoaluminate cement, and a calciumaluminosilicate cement; wherein the at least two cements comprise atleast 10 percent of the composition wherein the cementitious compositionbonds to asphalt.
 26. The cementitious composition of claim 25, whereinthe cementitious composition is free of latex bonding agents, Portlandcement, and a non-Portland hydratable cement powder selected from agroup comprising fly ash, rice hull ash, opal, diatomaceous earthvolcanic ash, ground blast furnace slag cement, and high free limecontent powder.
 27. The cementitious composition of claim 25, furthercomprising an additive selected from a group comprising retarders,shrinkage reducing agents, air entraining agents, aggregates, fillers,pigments, water reducers, fiber reinforcements, rheology modifiers, andset accelerators.